The Citadel garrison was the contingent of Yuuzhan Vong Warriors who were tasked with defending the Supreme Overlord Shimrra's Citadel. During the Battle of Yuuzhan'tar, Shimrra placed them at the right hand of Nom Anor, the new Prefect of Yuuzhan'tar, with orders to wipe out every Shamed One on on the Vongformed capital.